... system is compact and intelligent power system containing up to 6 nos. DZY (50H) series rectifiers, controller, LVD, AC& ... energy-saving and up to 0.99 power factor. Intelligent fan-cooling technique enables good cooling performance, low failure ... ;Psophometric noise ≤ 2.0mVAudible noise ≤ 55dBDCRectifier DZY-48/50HController Model: DKD31; LCD display panel4 buttonsAlarms Relays 8 relaysOperating temp. ...